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@article{TRSPY_1967_88_a0, author = {V. I. Berdyshev}, title = {Jackson's theorem in $L_p$}, journal = {Informatics and Automation}, pages = {3--16}, publisher = {mathdoc}, volume = {88}, year = {1967}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/TRSPY_1967_88_a0/} }
V. I. Berdyshev. Jackson's theorem in $L_p$. Informatics and Automation, Approximation of functions in the mean, Tome 88 (1967), pp. 3-16. http://geodesic.mathdoc.fr/item/TRSPY_1967_88_a0/